package net.guerlab.credits.usercredits.exception;

/**
 * 无效用户ID错误
 * 
 * @author guer
 *
 */
public class UserIdIsNullError extends RuntimeException {

    private static final long serialVersionUID = 1L;

    public UserIdIsNullError() {
        super("无效用户ID");
    }
}
